全文获取类型
收费全文 | 1975篇 |
免费 | 13篇 |
国内免费 | 15篇 |
专业分类
安全科学 | 43篇 |
废物处理 | 61篇 |
环保管理 | 167篇 |
综合类 | 322篇 |
基础理论 | 471篇 |
环境理论 | 3篇 |
污染及防治 | 650篇 |
评价与监测 | 148篇 |
社会与环境 | 134篇 |
灾害及防治 | 4篇 |
出版年
2023年 | 17篇 |
2022年 | 46篇 |
2021年 | 46篇 |
2020年 | 23篇 |
2019年 | 27篇 |
2018年 | 107篇 |
2017年 | 87篇 |
2016年 | 138篇 |
2015年 | 73篇 |
2014年 | 105篇 |
2013年 | 145篇 |
2012年 | 121篇 |
2011年 | 161篇 |
2010年 | 90篇 |
2009年 | 86篇 |
2008年 | 120篇 |
2007年 | 109篇 |
2006年 | 93篇 |
2005年 | 60篇 |
2004年 | 71篇 |
2003年 | 45篇 |
2002年 | 38篇 |
2001年 | 28篇 |
2000年 | 18篇 |
1999年 | 12篇 |
1998年 | 5篇 |
1997年 | 10篇 |
1996年 | 9篇 |
1995年 | 9篇 |
1994年 | 8篇 |
1993年 | 10篇 |
1992年 | 6篇 |
1991年 | 7篇 |
1990年 | 5篇 |
1989年 | 3篇 |
1988年 | 6篇 |
1985年 | 3篇 |
1984年 | 3篇 |
1983年 | 3篇 |
1982年 | 3篇 |
1981年 | 3篇 |
1980年 | 6篇 |
1977年 | 3篇 |
1966年 | 3篇 |
1965年 | 2篇 |
1964年 | 4篇 |
1961年 | 3篇 |
1960年 | 2篇 |
1959年 | 2篇 |
1954年 | 2篇 |
排序方式: 共有2003条查询结果,搜索用时 15 毫秒
891.
Hepatitis E Virus in Farmed Rabbits,Wild Rabbits and Petting Farm Rabbits in the Netherlands 总被引:1,自引:0,他引:1
Sara?A.?BurtEmail author Jorg?Veltman Renate?Hakze-van der Honing Heike?Schmitt Wim?H.?M.?van der?Poel 《Food and environmental virology》2016,8(3):227-229
Rabbits have been suggested as a zoonotic source of Hepatitis E virus. Phylogenetic analysis of HEV isolates from farmed, wild and pet rabbits in the Netherlands (23, 0, and 60 % respectively) showed them to be grouped amongst published rabbit HEV sequences and distinct from most human isolates. Dutch rabbits are unlikely to be a zoonotic source. 相似文献
892.
Miguel F. Varela Annalise S. Hooper Enrique Rivadulla Jesús L. Romalde 《Food and environmental virology》2016,8(3):187-193
The prevalence and genetical diversity of human Sapovirus were studied during an 18-month study in Ría do Burgo, an estuary nearby the city of A Coruña in Galicia (NW Spain). Sapovirus was detected using RT-qPCR procedure in 30 out of 80 mussel samples (37.5 %). Quantifications ranged from 2.2 × 103 to 2.1 × 105 RNA copies per gram of digestive tissue. Detection occurred mainly during the cold and rainy seasons of the period studied. Sequences obtained could be distributed into 5 genotypes being the most abundant GI.1 and GI.3. Results obtained indicate that the hydrodynamic characteristics of the harvesting area and the proximity of population density clearly influence the presence of the virus in shellfish. 相似文献
893.
Raphaël Mathevet François Bousquet Catherine Larrère Raphaël Larrère 《Journal of Agricultural and Environmental Ethics》2018,31(5):605-623
This paper explores and discusses the various meanings of the stewardship concept in the field of sustainability science. We highlight the increasing differences between alternative approaches to stewardship and propose a typology to enable scientists and practitioners to more precisely identify the basis and objectives of the concept of stewardship. We first present the two dimensions we used to map the diversity of stances concerning stewardship. Second, we analyse these positions in relation to the limits of the systemic approach, ideological manipulation, responsibility, and solidarity. In the final section we explain how the concept of ecological solidarity, a core principal in recent French law on biodiversity conservation and national park governance can contribute to the underpinning of a specific form of social-ecological stewardship. 相似文献
894.
Margarida Liz Martins Luís M. Cunha Sara S.P. Rodrigues Ada Rocha 《Waste management (New York, N.Y.)》2014,34(8):1362-1368
The aim of this study was to validate the visual estimation method for aggregated plate waste of main dish at Portuguese primary school canteens. For this purpose plate waste at school lunch was measured for 505 individual servings, using weighing individual servings and plate waste and visual estimation method by a 6-point scale, as developed by Comstock et al. (1981). A high variability of initial serving weights was found with serving sizes ranging from 88.9 to 283.3 g and with a coefficient of variation ranging from 5.5% to 24.7%. Mean plate waste was 27.5% according to the weighing method. There was a significant bias in the conversion of the visual waste estimations to actual waste, being overestimated by an average of 8.0 g (ranging from ?12.9 g to 41.4 g). According to Bland and Altman plot, the mean difference between methods was of 8.0 g and the amplitude interval was 102.6 g. The study showed that the visual estimation method is not as accurate as the weighing method in assessing nonselective aggregated plate waste at primary school canteens. Our findings are thus very important on considering plate waste assessment, since the wide variation on initial servings introduces a relevant bias when considering standard portions or a random sample of initial servings. Although, greater convenience, time-saving and the possibility to monitor plate waste of large groups, make the visual estimation method an important method to assess plate waste at school canteens, these results highlighted the need of portions standardization and control of initial servings to allow for its use. 相似文献
895.
Tisca Juliana F. dos Santos Karin Pessati Tomás B. Zacchi Flávia L. Soares Fabíola S. Oliveira Vanessa A. Bebianno Maria J. A. F. Bainy Afonso C. D. Razzera Guilherme 《Environmental science and pollution research international》2021,28(22):27823-27824
Environmental Science and Pollution Research - A Correction to this paper has been published: https://doi.org/10.1007/s11356-021-13135-x 相似文献
896.
Agrawal Pankaj Araújo Aylanna P. M. Brito Gustavo F. Cavalcanti Shirley N. Alves Amanda M. Freitas Daniel M. G. Mélo Tomás J. A. 《Journal of Polymers and the Environment》2021,29(6):1777-1788
Journal of Polymers and the Environment - This work aims to investigate the effect of organically modified montmorillonite (OMMT) and vermiculite (OVT) clays on the properties of poly(lactic acid)... 相似文献
897.
898.
899.
900.
Sandra Kim Tiam Xavier Libert Soizic Morin Patrice Gonzalez Agnès Feurtet-Mazel Nicolas Mazzella 《Environmental monitoring and assessment》2014,186(6):3931-3939
The Morcille River located in the Beaujolais vineyard area (Eastern France) is subjected to strong vine-growing pressure leading to the contamination by a range of herbicides and fungicides of the surrounding freshwater environment. Particularly high concentrations of norflurazon, desmethyl norflurazon and tebuconazole were recorded in spring 2010 at the downstream site of the river. Despite their occurrence in rivers, scarce toxicity data are available for these products, in particular in the case of desmethyl norflurazon (main norflurazon degradation product). Furthermore, the toxicity data are generally available only for single compounds and are issued from single species toxicity tests, leading to a lack of ecological relevance. Consequently, this study was undertaken to evaluate the toxic effects of norflurazon, desmethyl norflurazon and tebuconazole singly and in a ternary mixture on fluvial biofilm. Toxicity tests were performed in microplates for 48 h. Photosynthetic endpoints were measured using pulse amplitude-modulated fluorometry; diatom densities and taxonomic composition were determined. After 48 h of exposure, significant effects on optimal quantum yield (F v/F m) for desmethyl norflurazon and mixture were observed. 相似文献